Adjustable limit or other gage.



T. HUMPAGE. v ADJUSTABLE LIMIT OR OTHER GAGE;

APPLIOATION. FILED JULY 3,1903.

PATENTBD JANJSl, 1905. f

Inventor".

Tfium vage,

PATENTED JAN. 31, 1905. I

T. HUMPAGE. Q ADJUSTABLE LIMIT 0 OTHER-GAGE.

APPLICATION FILED JULY 3,1903.

2 SKEIJTS-SHBET 2.

IEEEE UNITED STATES Patented January 31, 1905.

PATENT I OFFICE.

THOMAS I-IUMPAGE, OF BRISTOL, ENGLAND.

ADJUSTABLE LIMIT OR OTHER GAGE.

SPECIFICATION forming part of Letters Patent No. 781,524, dated January 3 1, 1905.

To aZZ whom it may concern: 7

Be it known that I, THOMAS I-IUMPAGE, a subject of the King of Great Britain and Ireland, residing at the city of Bristol, England, have invented certain new and useful Improvements in Adjustable Limit or other Gages;

- and I do hereby declare the following to be a full; clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to adjustable limit and other gages and the like. v

Referring to the accompanying drawings, Figure 1 is a side elevation, partlyv sectional,

of an adjustable limits-gage as made in accordance with this invention. Fig. 2 is an end view as seen from the anvil end. Fig. 3 is an end viewat the outer end of the adjustment-spindle. Fig. 4 is a plan view of the adjustable sliding stop used in the instrument as hereinafter set forth. Fig. 5 isa vertical section through the adjustment-spindle. Fig. 6 is a view in side elevation, partially broken away; Figs. 7 and 8, end elevations at opposite ends of the support, and Fig. 9a

bottom plan fragmentaryview of a modified vation of same; and Figs. 16, 17, 18, and 19 are views. respectively similar to Figs. 1, 2, 3, and 5, showing the application of my improved looking arrangement for the adjustment-spindle as applied to a gage with a fixed anvil.

I In the construction of the instrument illustrated in Figs. 1 to 5 both the adjustmentspindle a for adjusting to standard-bar lengths and the anvil b for'settin'g to the limits of inaccuracy are screw-threaded. On the outer end of the anvil bis clamped a lever c, which the instrument.

Application filed July 3,1903. Serial No. 164,155.

may conveniently be termed the limits-le-c ver. The limits-lever c, which is preferably graduated, as shown. extends to a quadrant '03, formed on-or attached to the frame 6 of An adjustable sliding stop f, having lugs f on each side of a central tongue f", determines the range of the limitslever 0 laterally on either side of a zero line or mark 0, Fig.2, borne midway on the quadrant d. The extent of lateral range of the limits-lever c varies with the position of the slide f, the tongue f of which rides in a groove g, Fig. 2,.in the instrument-frame e.

The range of lateral movement of the limitslever 0 decreases as the slidefis moved farther away from the anvil b. In using the gage the center line 0' of the limitS-leverc is brought to coincide with the zero line 0 of thequadrant (2. Adjustment is then made to a standard bar, which is of length nearest the dimension to be worked to. This adjustment is effected, as ordinarily, by turning the adjust- 'mentspindle a, and the further adjustment from the standard-length barto required dimension to be worked to isalso made, as ordinarily, by turning the spindle a to the requisite extent, guidance in thisre'spect being afforded bythe zero-line 0 on the spindle a and the graduations a on the outer face of the spindle-socket a. The gage is. under this invention fitted with means for locking the spindlea after adjustment aforesaid has been made.

Also a sealing or supplementary locking device isprovided and is so arranged as to ne. cessitate fracture or unfastening of the said device before the spindle a can be unlocked. The sealing or supplementary locking device serves as a telltale in event of tampering after adjustment. These locking arrangements are hereinafter described. The adjustments above set forth having been made, the limits-lever c is next moved until its centerline 0 coincides at one side of the Zero-line 00f the quadrant d withthe graduation on the quadrant which corresponds to the predetermined limit of end motion allowed in one direction to the anvil b. The anvil Z) is thus turned to the extent which gives the requisite degree of end movement in one direction. The graduations of the quadrantd relate on one side of 'with a device, as a seal on.

the Zero-line 0 of the quadrant to the limit of l maximum. On the other side of the said zeroline 0 the graduations relate to the limit of minimum. Accordingly, the lever 0 being set for limit in one direction, the corresponding limit in the opposite direction is also thereby fixed. The limits having been fixed, the slide f at the anvil end of the instrument is next adjusted in the frame 0 to meet the lever 0, moved to the limit graduation of the quadrant d, as aforesaid. If the lever c be graduated, as is the case in the example shown in the drawings, the graduation thereon corresponding to the limit graduations of the quadrant (Z will coincide with an assigned part of the slide f, as seen at Fig. 2, in which the graduation .75 of the lever c, which agrees in value with the graduations on the quadrant d at which the center line 0' of the lever stands, coincides with the inner corner of one of the lugs f of the sliding stopf'. The numerals on the graduation of the lever 0 express decimal-fractions of a thousandth part of an inch. and the reading signifies the extent of end movement of the anvil b. The unit is not necessarily a thousandth part of an inch. It is the unit adopted in the example instrument shown in the drawings. Obviously other units may be adopted. he slidef is next secured in place by a device hereinafter set forthnamely, a lead-wireso that the limits-lever 0 cannot move at either side beyond the set limits, the slide f constituting a stop preventing further movement of the lever. The form of lock for locking the adjustmentspindle a after adjustment thereof consists of a bolt'h, serrated or dentated at one end. The bolt h is contained within a socket z',provided in the frame'e and at right angles to the spindle a. A pin j, fixed to the bolt it, extends outward to the exterior of the socket 2' through a slot 2". The socket i is screw-thread ed toward its outer end to take a screw-threaded plug 71:. The adjustment-spindle a is grooved longitudinally on its screw-threaded peripheral surface, the grooves being at suitable distances apart. (See more particularly Fig. During adjustment of the spindle a the bolt it is drawn back. After adjustment of the spindle (a the bolt h is, through the medium of the pin 7', pushed into engagement with the spindle a, which is thereby locked. The plug it is then screwed up behind the bolt 7i, holding it up in the locking position. The supplementary lock above referred to is applied behind the plug l: to prevent its unauthorized removal. The supplementary lock may vary, as any suitable locking means may be employed. The form, shown in the drawings for the purpose of illustration only, is that of a lead-wire Z, which after having been passed through the frame 6 and socket and behind the plug Z; has its ends pressed together and impressed The instrument having been adjusted, set, and locked is ready for use without further regard or reference on the part of the user to either index. The device for locking the limits-slide f obviously may also be any suitable locking means; but for illustration 1 have shown the locking means as comprising simply a lead-wire 7, (shown in section for elearness,) passed through a hole provided in the tongue holes a being made also in the frame (1 to take the wire. The lead-wire is passed through the frame 0 and through the tongue of the slide f when they coincide, which they do when the slidef is in a desired position, with its indicating-corner coinciding with the required graduation of the limits-lever 0.

At Figs. 6, 7, 8, and 9 is shown a modification. In these figures corresponding parts to those in Figs. 1 to 5, inclusive, are indicated by corresponding letters of reference. In this modification the anvil is not screwthreaded. The adjustment-spindle (r is, as in the arrangement described with reference to Figs. 1 to 5, inclusive, screw-threaded and grooved. The locking arrangement for locking the adjustment-spindle (l/ is precisely similar. A spring 1), carried in the frame w, tends constantly to force the anvil outward--- that is to say, away from the adjustmentspindle a which latter is arranged and fitted as in the arrangement above described with reference to Figs. 1 to 5, inclusive. A conical cavity 6 is provided in the anvil l), and this cavity b receives the conical end of a spindle g, which is set at a right angle to the anvil Z) and which toward the other end is screw-threaded and has attached to it the limits-lever 0, corresponding to the limits-lever in the arrangement first above described. The limits-lever is controlled by a similar sliding stop f, adapted to be locked to the frame a in a similar manner. End movement inwardly of the anvil 7) toward the adjustment-spindle a is obtained by moving the limits-lever 0 so as to cause the conical end of the spindle q to enter farther into the cavity 6 in the anvil f), and so to force the anvil forward to the extent required. A graduated quadrant d is provided on the frame as seen more particularly at Fig. 9, which represents an under side plan view, as seen from below. The graduations of the quadrant correspond to a certain degree of end movement of the anvil I).

At Figs. 10, 11, 12, and 13 is illustrated a further modification. In this modification the anvil b is angularly shaped and is disposed at an inclination in its socket in the frame. It is acted upon by a spring let into it and into the frame, the said spring 7) constantly tending to retire the anvil Z). The limits-lever c has a fulcrum on the pin a, fitted in the frame a. The inner face of the limits-lever c bears against the rear of the anvil 7). End movement of the anvil Z) inwardly is obtained by tilting the lever c on its fulcrum 0, so as to force the anvil forwardagainst the resistance which in this construction subserves the index or center line 0. This answers-to the quad, rant employed in the arrangements previously described. The sliding stop f is modified to provide for the inward-and-outward or forward-and-backward movement of the lever c, as distinguished from the lateral or sidewise movement of the corresponding lever in the two arrangements first above described.

As applied to micrometer-gages, this invention combines therewith a limits-lever and stop for setting and for fixing the limits of inaccuracy, thus adapting a micrometer-gage to serve'as an adjustable limit-gage. According to one arrangement, (illustrated at Figs.

14 and I5 of the drawings,) the limits-lever 0 is adapted to be clamped on the thimble r, by which adjustment to standard lengths is, as ordinarily, made through thespindle s. The limits-lever 0 has a. range of adjustment sidewise between the lugs f of the sliding stop f, by which, as in the arrangements above described, the limits of inaccuracy are fixedafter the stop f has been adjusted and locked. Whileadjustment is being made to standard lengths the clamping-screw t of the limitslever cis loosened, giving freedom for rotation of the thimble 9". 'After adjustment to standard lengths has been made the limits-lever 0 is set with its zero-line 0' coinciding with the zero-line 0 on the frame 6. The clampingscrew t is next tightened up. The stop f is next adjusted to the determined limits of inaccuracy and is then locked. The instrument rangement combining an adjustment spindle a and locking devices, as shown at the adjustment-spindle ends in Figs. '1, 8, 6, and 8, with a fixed anvil w. Like letters of reference in Figs. 16 to 19, inclusive, indicate like parts in Figs. 1, 3, 6, and 8. The instrument as thus arranged is a gage which can be locked in variable positions, each of such positions giving a fixed gage.

What I claim is 1. In devices of the character described, the combination with a substantially solid support, of a pair of opposed members suitably carried by said support, one of said members being bodily movable relatively to the other with said bodily-movable member, said angularly-movable means being at all times free to swing, and a stop adjustable alongsaid indieating means for limiting the degree of swing of said angularly-movable means. 7

2. In devices of the character described, the combination with a support, of a pair of opposedmemberssuitably carried by said support, one of said members being bodily movable relatively .to the other member, angularly-movable means operatively associated with said bodily-movable member for limiting the latters movement, a radially-adjustable stop mounted on said support for limiting the movement of said angularly-movable means, and means for locking said stop in its adjusted position.

3Q Indevices of the character described, the

j combination with a support, of a pair of opposed members suitably carried by said support, one of said members being bodily movable relatively to the other. member, an indicating-lever operatively associated with said bodily-movable member for limiting its movement, and a stop adjustable longitudinally of said lever for limiting its swing.

4. i In devices of the character described, the

combination with a support, of a pair of opposed members suitably carried by said support, one of said members being bodily movable relatively to the other member, an indicating-lever operatively associated with said bodily-movable member for limiting its movement, a stop adjustable longitudinally of said lever for limiting its swing, and means for locking said stop in its adjusted position.

i 5 In devices of the character described, the

ibo

combination with asuitable support, of a pair 6. In devices of the characterdescribed, the I combinationwith a suitable support, of a pair of opposed members carried by said support,

one of saidmembers being rotatably mounted I in its support and bodily movable'toward and away from the other member by its rotation, an 1nd1cat1nglever carried by said rotary member, and means for limit ng the swing of said lever, comprisingasto'p adjustable along said lever.

7. In devices of the character described, the combination with a suitable support, of a pair of opposed members carried by said support one of said members being rotatably mounted in its support and bodily movable toward and away from the other member by its rotation,

an indicating-lever carried by said rotary said lever, comprising a radially-adjustable .member, and means for limiting the swing of Y stop, and means for locking said stop in its adjusted position.

8. In devices of the character described,the combination with a support, of an ad justmentspindle carried-by said support, a rotary anvil carried by said support and movable in its support toward and away from said adjustment-spindle by its rotary action, an indicatsaid locking-pin in engagement with said adjustment-spiinlle.

10. In devices of the character described, the combination with a suitable support, of an anvil member carried by said support, an adjustment-spindle screw-threznled on its outer surface mounted in said support and provided with a plurality of serrations extending longitudinally of its screw-threaded surface, and means for locking said adjustment-spindle comprising a locking-pin provided at its upper end with a plurality of serrations adapted to engage the serrations on the adjustmentspindle, and means for holding said lockingpin in engagement with said adjustmentspindle.

In testimony whereof I aliix my signature in presence of two witnesses.

THOMAS HUM FAG E.

\Vitnesses:

BERNARD DE SoYREs, \VILLIAM. llnNi-n' 'lm'mn. 

